Πανελλήνιος...

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    14-Jan-2017
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    Education

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Transcript of Πανελλήνιος...

  • 1

    , .

    1 2 3 4 5

    6 7 8 9 10

    11 12 13 14 15

    16 17 18 19 20

    21 22 23 24 25

    1. , .

    .

    2. 40% :

  • 2

    u = u 40%u u = u

    40100

    u u = 600040

    1006000

    u = 6000

    40100

    6000 u = 6000 2400 u = 3600 m / s

    t1 , - , u = 6000 m/s d ( ):

    u =

    dt1 d = u t1 d = 6000 t1 (1)

    d (t1 +8)s, 8s , :

    u =

    dt1 +8

    d = u (t1 +8) d = 3600 (t1 +8) (2)

    (1), (2):

    6000 t1 = 3600(t1 +8)10t1 = 6(t1 +8)10t1 = 6t1 + 48 4t1 = 48 t1 = 12 s

    .

    B3. d ( ) (1) (2):

    d = 6000 t1 d = 6000 12 d = 72.000m

    .

    B4. , . - .

    , ( ) .

  • 3

    1.

    2. : 6s, 12s 18s 24s.

    3. = 12s. :

    f = 1

    T f = 1

    12Hz

  • 4

    4. t = 24s , S :

    S = 8A

    = 60 cm = 0,6 m :

    S = 4,8 m.

    , S t = 24s, u :

    u =

    St u =

    4,824 u = 0,2 m / s

    :

    u = f =uf = 0,2

    112

    = 2,4m

    1. , (1) Rk,1 :

    Rk,1 =

    V1I1 Rk,1 =

    11011103

    Rk,1 = 10 103

    (2) Rk,2 ::

    Rk,2 =

    V2I2 Rk,2 =

    12010 103

    Rk,2 = 12 103

    2. :

  • 5

    (1), R1, :

    R1 = Rk,1 = 10 10

    3

    (2), R2 R3 - , :

    1R2,3

    = 1R2

    + 1R3 1

    R2,3= 1

    20+ 1

    30 1

    R2,3= 5

    60 R2,3 = 12 k

    :

    R2,3 = Rk,1 = 12 10

    3

    3. , (1) (2) , V, . V/I , - , :

    V/I , :

    1R1,2,3

    = 1R1

    + 1R2

    + 1R3 1

    R1,2,3= 1

    10+ 1

    20+ 1

    30 1

    R1,2,3= 1

    10+ 1

    20+ 1

    30

    1R1,2,3

    = 1160 R1,2,3 =

    6011